Chapter 7 - "The Slug Club" - In which Harry thinks Malfoy might be a Death Eater, everyone departs for King's Cross, and before getting on the train Harry tells Mr. Weasley his suspicions. On the train, Harry finds he is more famous than ever, but sits with Neville and Luna until Slughorn invites him to tea. After hours of boring conversation, Harry sneaks into the Slytherins' compartment, invisible, and listens to Malfoy brag about working with Voldemort, but when the train stops Malfoy freezes Harry and leaves him behind.
A Very Different Diagon Alley
[Harry], [Hermione], and [Ron] run into [Draco] and [Narcissa Malfoy] at [Madam Malkin's], and after a brief confrontation, the [Malfoys] leave the shop and [Hermione] quickly buys her robes.
[Harry], [Hermione], and [Ron], along with [Hagrid], meet back up with the [Weasleys] and head over to [Weasleys' Wizard Wheezes].
Weasleys' Wizard Wheezes
[Harry] and his friends find [Weasleys' Wizard Wheezes] - thanks to a [U-NO-POO] sign - and start to look around the shop.
[Fred] and [George] show [Harry], [Hermione], and [Ron] around [Weasleys' Wizard Wheezes].
[Fred], under the guise of showing his siblings around [Weasleys' Wizard Wheezes], grills [Ginny] about her love life, while [Ron] tries to take stuff from the shop for free.
Following Draco in Knockturn Alley
[Harry] spots [Draco Malfoy] heading down [Diagon Alley] alone - and he, [Ron], and [Hermione] slip under the [Invisibility Cloak] to give chase.
[Harry], [Ron], and [Hermione] listen in as [Draco Malfoy] buys something from [Mr. Borgin] in [Borgin and Burkes] - and threatens him besides.
[Hermione] charges into [Borgin and Burkes] to try to figure out what [Malfoy] had bought, though she is unsuccessful. The trio then returns to [Weasleys' Wizard Wheezes].
[Harry], discussing [Malfoy] with [Hermione] and [Ron], figures out that [Malfoy] is a [Death Eater].